#include <iostream>
#include "add.h"
#include "sub.h"

int main (int, char **)
{
    std::cout << "Hello, world!\n";
    std::cout << "12 + 13 = " << add (12, 13) << "\n";
    std::cout << "17 + 13 = " << sub (17, 13) << "\n";
}
